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by skiddaw
Sat Nov 30, 2013 9:42 pm
Forum: Automation, sensing and robotics
Topic: Monitor 5V GIPO pin in python, how to?
Replies: 3
Views: 1362

Re: Monitor 5V GIPO pin in python, how to?

As far as I know there is no analogue input on the rPi to monitor voltage. Do you have a scratchpad area where you could add an op-amp circuit to compare Vb against Vref and produce a Hi/Low fed into a GPIO line?
by skiddaw
Tue Mar 05, 2013 3:04 am
Forum: General discussion
Topic: I can't make money doing research but forced to sell.
Replies: 10
Views: 2019

Re: I can't make money doing research but forced to sell.

We put our small flat TV away last May before heading off to Switzerland. Funny but we never pulled it out again until I found my flat screen terminal connector didn't match my new Pi. Then I remembered all those connectors on the back of the TV and yippee they matched. So now my evenings are spent ...
by skiddaw
Fri Mar 01, 2013 1:59 am
Forum: Other programming languages
Topic: FORTH Language for RPi ?
Replies: 10
Views: 8138

Re: FORTH Language for RPi ?

I've just had printed the 4tH Forth 'compiler' by J.L Bezemer, better known as The Beez: http://thebeez.home.xs4all.nl/4tH/ Google group: https://groups.google.com/forum/?fromgroups#!forum/4th-compiler I do have 4tH running on a 'Pi but as yet I'm still struggling with the installation. 4tH is a COM...
by skiddaw
Mon Feb 25, 2013 3:08 am
Forum: Automation, sensing and robotics
Topic: PWM for servos, motors, and LEDs plus.
Replies: 22
Views: 35587

Re: PWM for servos, motors, and LEDs plus.

On my pi, in the pigpio folder I run tar -xf pigpio-V2.tar and get
tar: This does not look like a tar archive
Even tar -t ditto gets me nothing
any ideas?
by skiddaw
Mon Feb 25, 2013 2:36 am
Forum: General discussion
Topic: Power Supply - A Sticky Topic for Beginners
Replies: 35
Views: 50773

Re: Power Supply - A Sticky Topic for Beginners

e.g. my MS Wireless keyboard receiver wants 5V at 100mA. I hought I'd throw in some measurements here. My Staples 5V 2A Dual Device Rapid Wall Charger gives 4.73V at the GPIO 5V pin and I read the same on the 'RG2' regulator. The GPIO 3.3V pin reads 3.28V. The charger has a secondary USB outlet whic...
by skiddaw
Mon Feb 25, 2013 1:35 am
Forum: General programming discussion
Topic: Load SD Card Image using camera
Replies: 3
Views: 917

Re: Load SD Card Image using camera

The camera opens as a drive. On my laptop the Camera (Samsung S760) opens in AutoPlay as Removable Disk (E:) with options to Open Folder to View Files (using Windows Explorer). I closed AutoPlay and ran Win32 Disk Imager, with Image Field: 2013-02-09-wheezy-raspbian.img and Device Field: [E:\] (if i...
by skiddaw
Sun Feb 24, 2013 3:57 am
Forum: General programming discussion
Topic: Load SD Card Image using camera
Replies: 3
Views: 917

Load SD Card Image using camera

My first 'Pi software update quit in the middle leaving me a corrupted SD card. It was likely due to an overloaded keyboard interface. I have no SD Card read/write sockets on any of my PCs, unlike what I saw in Europe where maybe it is standard. My solution was to plug my 4G SD card into my camera a...
by skiddaw
Fri Feb 01, 2013 3:40 am
Forum: Automation, sensing and robotics
Topic: 240v 500ma MOSFET questions.
Replies: 6
Views: 2820

Re: 240v 500ma MOSFET questions.

I've often salvaged RELAYS out of old microwave ovens. As an example the OMRON G4W-2212P-FD-US-TV5 has a 12VDC coil and the contacts are rated 10A 250VAC/24VDC. They are also a good source for micro-switches(3) and large magnets(2) The size is approx: 30mm x 18mm x 30mm (1.125 x 0.75 x 1.125) I use ...
by skiddaw
Tue Jan 31, 2012 3:30 pm
Forum: Off topic discussion
Topic: Livecoding with Qt5 on the Raspberry Pi
Replies: 0
Views: 856

Re: Livecoding with Qt5 on the Raspberry Pi

<t>In 1968, during my second term of an apprenticeship with "English Electric Leo Marconi Computers Limited" in Kidsgrove I was assigned to the Design Automation Department.  The R-Pi Livecoding demonstration reminds me of some software the resident programmer had written to edit Digital PDP-8 code ...

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